Thirds to john s



E. A. TERUSH GHURN.

No. 245,582. altent'ed Aug. 9,1881I fwn c' e m,

f "",V 2 ar r y am iw m f NTTED STATES PATENT OEEICE.

EDWARD A. THRUSH, OF READING, PENNSYLVANIA, ASSIGNOR OF TWO- THIRDS TO JOHN S. HILL AND PETERS.A HILL, BOTH OF SAME PLAGE.

CHURN.

SPECIFICATION forming part of Letters Patent No. 245,582, dated August 9, 1881.

Application had January 24.71880.

To all whom it may concern:

Be it known that I, EDWARD A. TnRUsma citizen of the United States, residing at Reading, inthe county ot' Berks and State of Pennsylvania, have invented new and useful lmprovements in Ohurns, of whichthe following is a specification.

The present invention relates to that class of churnsin which provision is made for tempering the cream, or maintaining the same at a proper temperature, by the introduction of hot or cold water into a chamber partially surrounding the cream or working chamber of the churn.

rI he invention consists in a certain combination and arrangement of part-s, fully hereinafter described, and pointed out in the claim.

In the drawings, Figure I lis a perspective view-of a churn constructed according to my invention, the lid being in a raised position. Fig. 2 is a transverse vertical section. Fig. 3 is a longitudinal section thereof. Fig. 4 is a detached perspective view of the dasher.

TheletterAdesignatesarectangular wooden box, which constitutes the outer casing of the churn. Nearly flush with the upper edges of its walls, and on the inside thereof, the box is provided with cleats or rails B, secured to said walls by means of screws c inserted through the walls from the outside and not passing entirely through the cleats B.

Vithin the box A is arranged a sheet-metal box, D, which formsthe cream-receiver or dasher-chamber, and this box is of such a size that a continuous or intercommunicating space is formed between the outer surfaces of its walls and the inner sides of the box A. The sheetmetal box D is provided at its top, on all its sides and ends, with an outwardly-projecting flange, c, which rests upon the cleats B, and is secured thereto by the wood screws c' passed through said ange and entering the cleats B. The cream-chamber can readily be removed by detaching the cleats from the box upon removal ofthe screws c. chamber can be detached without the cleats by removing the screws c.

About the center of one of the end walls, A of the box or outer wooden casing a screw, j',

If desired, however, the cream- V having an unthreaded inner portion with conical point is passed through a nut,f, tted in 5o said wall. The inner conical end of this screw passes through a packing-sleeve, g, which is inserted into a short tubular projection, g', of the cream-receiver D. The conical end projecting through the packing in the manner stated enters a plate, q, on one ofthe arms, O', ofthe dasher-frame, and constitutes one ofthe central bearings of said dasher. The object of the packing and short tube g is to prevent leakage. At the opposite end, A, of the box a short shaft, h, having a square inner tip, It', projects through the outer and sheet-metal boxes and a tube, t', passed through the wall A. This shaft h is provided with a circular collar, i, which is fitted into an op'eningmade in the end wall ofthe cream-receiver. The portion of the collar projecting inside said receiver is encircled by a packing-disk, which, in connection with said collar, insures a liquidtight joint.

The tubular bearing fi', projecting through the outer casin g, may be packed in any suitable manner, and its inner end bears against the collar t' of the shaft h. In this manner the leakage of water or other liquid contained in the space surrounding the cream-chamber is eft'ectually prevented. A crank, J, on the outer end of the shaft'h serves to operate the dasher mounted on the center screw and said shaft.

The lid or cover of the churn is designated by the letter K. It is hinged to the box or casing in the ordinary manner. To the under surface ofthis lid is applied a projecting shallow box, L, which is preferably made of sheet 8 5 metal, and is of such a size as to lit closely within the top portion of the sheet-metal creamchamber D. From this box L a tube, m, extends through the lid, for the purpose of enabling said box to be filled with a heating or cooling liquid, as required. A tube, a, also leads through the wall of the outer casing, A, to the space between the walls of the same and the inner cream-chamber, and serves to introduce aheating or cooling liquid into said space. When the lid is closed, as shown in Figs. 2 and 3, it will be seen that the cream-receiver or working-chamber of the churn is practically entirely surrounded by a jacket, which can be readily iilled with a heating or cooling liquid, preferably Water, and by means of which the temperature of the cream may be regulated as desired.

The construction above described will serve to place the cream in the most favorable condition for churning, because the contents otl the cream-chamber can be maintained at a uniform temperature by entirely surrounding said chamber with a heating or cooling medium. In order topextract the greatest yield of butter I employ a rotary dasher, which consists of two frames, O, preferably made rectan gul ar in for m The end bars, 0', of these frames cross each other, and are secured to each other at their centers. Each of these frames is provided with a series of slats or beaters, l), set obliquely between their side bars, the slats or beaters of one frame passing between the slats or beaters of the other.

It will be perceived that the creanrreceiver can readily be removed from the outer casing for the purpose of cleaning the same or gaining access to the liquid-space formed between said receiver and the outer casing. The central bearings of the dasher are also so fitted into the outer casing and cream-receiver that they can be easily applied to and disengaged from the daslier. The means for packing the shaft or bearing openings so as to prevent leal;-

age and insure a firm connection of said bearings with the dasher are also very simple 'in construction and eiective in operation, as will be readily apparent.

l do not wish to claim, broadly, a churn having a cream-receiver or dasher-chamber surrounded on its sides and bottom with a waterchamber; neither do I wish to claim the combination, with a jacketed churn-body, of a hol low cover or lid adapted to receive a heating or cooling liquid.

What I claim is- A churn consisting ot' the box A, an inner chamber, D, having a curved bottom with its sheet-metal walls flan ged at their upper edges and supported by cleats B, said outer box and inner chamber having a water-space between them, the lid K, carrying the sheet-metal box L on its under side, the inlet-tube m, opening into said box, the pipe n, passing through the outer box into the space between the box and its inner chamber, the end bearin g, y, and conical center screw, f, for supporting the dasher and to enable it to be removed and replaced at will, all substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

E. A. THRUSH.

Witnesses:

J AMES L. NoRRIs, JAMES A. RUTHERFORD. 

